plat: marvell: mci: use more meaningful name for mci link tuning

The mci_initialize function name was misleading. The function itself
doesn't initialize MCI in general but performs MCI link tuning for
performance improvement.

Change-Id: I13094ad2235182a14984035bbe58013ebde84a7e
Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
diff --git a/include/drivers/marvell/mci.h b/include/drivers/marvell/mci.h
index 8ef0234..af5d620 100644
--- a/include/drivers/marvell/mci.h
+++ b/include/drivers/marvell/mci.h
@@ -10,7 +10,7 @@
 #ifndef MCI_H
 #define MCI_H
 
-int mci_initialize(int mci_index);
+int mci_link_tune(int mci_index);
 void mci_turn_link_down(void);
 void mci_turn_link_on(void);
 int mci_get_link_status(void);